Improvement in pumps



-UNITED' STATES yPATENT OFFIQE.

WlLLIAM BURLINGHAM, OF BALTIMORE, MARYLAND.

IMPROVEMENT IN PUMPS.

Specification forming part of Letters Patent No. 201,909, dated April 2,1878; application filed January 31, 1878.

To all whom it may concern:

Be it known that I, WILLIAM BURLINGHAM, of the city and county ofBaltimore, State of Maryland, have invented certain new and usefulImprovements in Pumps, of which the following is a full, clear, andexact description, reference being had to the accompanying drawings,making part of this specification, in

Y, Whichs of an intermediate metallic section 0f a pumpcylinder, inwhich the plunger or piston operates, having a contracted base, forminga support or seat for the check-valve, and provided with end sockets,adapting it to be readily united to the adjacent sections of thepumpcylinder, as hereinafter described.

It further relates to the construction of the clamping rings and platesof the plunger and check-valve, and to the means for uniting them, andto the arrangement of devices for facilitating the withdrawal of thecheck-valve, all as hereinafter fully set forth.

In the accompanying drawings, A represents the intermediate metallicsection of the pumpcylinder, provided at its ends with enlarged socketsA' A', for the reception vof the ends of the adjoining sections B B', ofwood or other suitable material, as shown in Fig. 1.

The bore of section A is contracted in diameter at its lower end, at a,in such manner as to form a support for the check-valve or checkvalveseat, which enters said contracted por,-

tion in wedging form, as shown, and is thus rmly held in place. Thissection of the cylinder, with its sockets, and having its borecontracted at the base, as-descrihed, is cast or otherwise formed in onepiece, and may, if desired, be lined on its inner face with porcelain,

galvanized iron, or other suitable material, for

. ciency and durability to the pump.

The 'check-valve or valve-seat (shown 1n section in Fig. 1, and inperspective in Fig. 3) is composed of a lower horizontal plate or ring,C, and an upper plate or ring, Cl, the latter having a pendent annularange, O2, made, by preference, slightly tapering from the plate Q', theouter edge of which projects beyond the vertical iiange C2, forming aclamping-shoulder, between which and the plate C the packing-ring D isplaced, surrounding the annular flange O2,`as shown. Y

The flange C2 extends downward into a depression or groove formed in theupper face of plate O for its reception, and ywhich serves to preventlateral displacement of the clampingplates relatively to each other; andthe plates, thus formed, are united a-nd drawn toward each other,clamping the packing ring D snugly between their outer edges, by acentral tubular screw, e, having a head, e, at its lower end, and ascrew-thread at its upper end, which engages with a correspondingscrew-thread in a central perforation in plate C'.

The plate G and the horizontal part of plate Cl are-perforated aroundthe connecting tubular bolt or screw, and between said bolt and theflange C2, to permit the free passage of the water. l

The plates O C', constructed as described, in connection with thepacking-ring D and the clamping Abolt or screw, form, as a-whole, thevalve-seat, adapted to fit into and be held firmly in place in thecontracted` portion a of the cylinder A, as described.

F is the valve, having a stem, f,-of less diameter than the bore of theconnecting tubular screw or bolt c, and which passes through saidtubular screw, and is provided on its lower end with a nut, f', whichserves to limit the throw or upward movement of the valve F.

The stem f, immediately below the valve,- plate F, is ,slightly enlargedin diameterto a depth `about equal to the thickness of a packing valveor Washer, F', of leather or equivalent material, placed immediatelyunder the valve or head F, and forming a packing between said head andthe perforated plate C1. The central perforation in this packing-washeris thus enlarged to about the bore of the tubular clamping-bolt e; andwhen the head F is lifted by power applied from above for withdrawingthe valve or valve-seat nfor any purpose, the packing-valve willdropdown upon they plate C1, and allow the water to escape through saidcentral perforation, and through the tube e around the stem f, therebyrelieving the valve of the weight of water above it and facilitating itsremoval.

The lower face of the head el of said tube has a series of radialgrooves, c2, formed init, for permitting the water to escape between itand thenutf on the valve-stem in the operation described.

In the ordinary operation of the pump, the packing-washer will, ofcourse, adhere to and move with the head F, rising to admit the waterthrough the perforated clampin g-plates, and dropping again, in theusual manner, for preventing its return.

The tubular connecting screw or bolt e is thus made to perform threedistinctfunctionsviz., first, of holding the clamping-plates togetherand adjusting them, as required; second, serving as a guide for thevalve-stem; and, third, as a conduit for the escape of the water indrawing the valve.

The packing-ring D is made of rubber, preferably having a tapering bore,as shown, matching the annular iiange G2, and tting snugly thereon, andfirmly clamped in the grooveiformed around said iiange by theoverhanging edges of the clamping-plates C (il.

The valve-head F is provided on its upper face with an upright T-shapedprojection or button, G, having the outer ends of the crosshead slightlycurved downward intohook form,

' as shown, for facilitating the withdrawal of the valve, as hereinafterexplained.

The clamping plates or rings of the plunger are similar in constructionto those of the check-valve seat; but for the purpose of distinguishingthem separate letters of reference are employed in describing them, asfollows:

C3 represents the lower plate; C4, the upper one, having the verticalannular flange; and D', the packing-ring, the plates having perforationsto permit the passage ofthe water similar to the perforations in platesC C*v for that purpose.

H is the pump-rod, provided at its lower end with a socket-piece, H',and I is a clamping-screw for uniting the plates C3 C4 and holding thepacking ring D in place, said screw engaging with the socket-piece H',as shown.

A valve, K, of leather or other suitable pliable material, is placedover the plate C4, coverin g the perforations therein, and held inposition between the end of the socket-piece H and the plate C4 by theaction of the clampingscrew l.

The packing-ring D is diii'erent inform from that employed in thecheck-valve, as instead of terminating at the lower face of the upperclamping-plate, it is shouldered at that point, atl d, to receive theouter edge of said plate, and outside of said edge the ring extendsupward, around, and above the plate, at d', forming an annularextension, and giving to the plunger, as a whole, a cup shape, as shown,and this upper edge or extension of the packing-ring, which is of rubberand pliable, will be crowded or pressed outward into close contact withthe cylinder by the action -of the water, and will thus more effectuallyarm or lever the fork 'i t" can be lowered, strid-` ing the hook or.button G, when, by giving the rod a quarter-turn, the hooks 1I z" willengage with said button or projection, and the check-valve can bereadily withdrawn for repairs or other purposes, as required.

It will be seen that by the construction -shown and described all theparts of the pump essential to complete its 'operation are brought,within the single intermediate metallic section of the pump-cylinder,all joints or couplings between the check-valve and the piston aredispensed with, and the liability to leakage, such as would impair theefficiency of the pump, toy a great extent obviated, whileV the easewith which any necessary adjustments or repairs can be made is greatlyincreased.

Having now described 'my invention, what I claim as new, and desire tosecure by Letters Patent, is

l. The intermediatemetallic cylinder A, having the contraction in itsbore, forming a seat or support for the check-valve, and provided withthe end sockets A"A, substantially as and for the purpose set forth. l2. The valve-seat composed of the plates'G C1 and central tubularclamping bolt or screw, in combination with the valve having the centralstem andthe hook or button, adapting the valve-seat' to be withdrawn,substantially as described. j V

3. The valve-seat composed of the clampingplates C Gl, packing-ring D,and central tubular connecting bolt or screw, in combination with thevalve F, with its stem f, arranged and operating substantially asdescribed.

4. The clamping-plates C3 C4 ofthe plunger;

united by the central bolt or screw, as described, in combination withthe shouldered rubber packingring DI ,forming both the packing and theplunger-cup, as described.

WILLIAM BURLINGHAM. Witnesses: i

GEO. H. BURNITT, PATRICK QUINLAN.

